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    SubjectRe: [RFC PATCH 1/8] iio: dummy: Introduce virtual registers for dummy device
    Daniel Baluta schrieb am 02.10.2014 15:43:
    > We need a way to store events generated by iio_dummy_evgen module,
    > in order to correctly process IRQs in iio_simple_dummy_events.
    >
    > For the moment, we add two registers:
    >
    > * id_reg - ID register, stores the source of the event
    > * id_data - DATA register, stores the type of the event
    >
    > e.g echo 4 > /sys/bus/iio/devices/iio_evgen/poke2
    >
    > id_reg 0x02, id_data 0x04
    >
    > This means, event of type 4 was generated by fake device 2.
    >
    > We currently use a hardcoded mapping of virtual events to IIO events.
    >
    > Signed-off-by: Daniel Baluta <daniel.baluta@intel.com>
    > Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
    > ---
    > drivers/staging/iio/iio_dummy_evgen.c | 16 ++++++++++++++++
    > drivers/staging/iio/iio_dummy_evgen.h | 7 +++++++
    > drivers/staging/iio/iio_simple_dummy.h | 2 ++
    > drivers/staging/iio/iio_simple_dummy_events.c | 23 ++++++++++++++++++-----
    > 4 files changed, 43 insertions(+), 5 deletions(-)
    >
    <...>
    > @@ -153,6 +161,14 @@ static ssize_t iio_evgen_poke(struct device *dev,
    > size_t len)
    > {
    > struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
    > + unsigned long event, ret;
    int ret
    > +
    > + ret = kstrtoul(buf, 10, &event);
    > + if (ret)
    > + return ret;
    > +
    > + iio_evgen->regs[this_attr->address].reg_id = this_attr->address;
    > + iio_evgen->regs[this_attr->address].reg_data = event;
    >
    > if (iio_evgen->enabled[this_attr->address])
    > handle_nested_irq(iio_evgen->base + this_attr->address);
    <...>


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